標(biāo)準(zhǔn)bs4190

1、BRITISH STANDARD BS 4190:2001ISO metric black hexagon bolts, screws and nuts — SpecificationICS 21.060.10; 21.060.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS 4190:2001© BSI 02-2001

2、iContentsPageCommittees responsible Inside front coverForeword iii1 Scope 12 Normative references 13 Finish 24 General dimensions 25 Length of bolts and screws 26 Ends of bolts and screws 37 Screw threads 38 Length of t

3、hread 49 Nuts — Squareness of thread to face 610 Chamfering and facing 611 Diameter of shank of bolt 812 Drilled bolts and split pin holes 813 Strength grade designation system for steel bolts and screws 1014 Material an

4、d manufacture of steel bolts and screws 1015 Mechanical properties of bolts and screws 1016 Strength grade designation system for steel nuts 1017 Material and manufacture of steel nuts 1118 Mechanical properties of steel

5、 nuts (excluding thin nuts) 1119 Marking and identification 1120 Inspection and testing 1121 Complete designation for the purpose of an enquiry or order 12Annex A (normative) Testing of mechanical properties of steel nut

6、s (see clause 18) 20Annex B (normative) Sizes greater than 68 mm diameter 22Annex C (informative) Manufacturers’ recommended range of sizes 23Figure 1 — Rounded end 3Figure 2 — Rolled thread end 3Figure 3 — Hexagon head

7、 bolt 4Figure 4 — Hexagon head screw 6Figure 5 — Head chamfering 7Figure 6 — Alternative types of normal thickness nut 7Figure 7 — Thin nut 8Figure A.1 — Proof load test for nut 20Table 1 — Product categories 2Table 2 —

8、Tolerance on nominal length 2Table 3 — Thread tolerance classes 3Table 4 — Thread lengths 4Table 5 — Thread runout (bolts) and underhead distance (screws) 5Table 6 — Split pin holes 9Table 7 — Strength grade designations